/* 基础布局 */
body{
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    font-size: 16px;
    line-height: 1.5;
    // background-color: pink;
   
  }
  h4,h3,ul,p{
    margin: 0;
    padding: 0;
    font-weight: normal;
  }
  ul{
    list-style: none;
  }
  a{
    text-decoration: none;
  }
